Wastegate Solenoid: Description and Operation

Description

WGT (Waste Gate Turbocharger) Control Solenoid Valve is mounted to the cylinder head and operates the WGT actuator which controls the by-pass passage of the turbocharger turbine.
When the turbine internal pressure is too high, engine knocking can occur in the gasoline engine because of excessive boost pressure. To reduce compressor boost the ECM opens the waste gate valve allowing exhaust gas to by-pass the turbocharger turbine and slows the compressor operation.